<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        ul{
            list-style-type: disc;
            /* list-stSyle-image: url(../img/P09.jpg); */
            list-style-position: outside;
        }
        li{
            border: 1px solid red;
        }
        #x1{
            list-style: circle url(#) inside;
        }
    </style>
</head>
<body>
    <ul>
        <li>111</li>
        <li>222</li>
        <li>333</li>
    </ul>
    <ul id="x1">
        <li></li>
    </ul>
    <style>
        .x2{
            list-style: circle;
            list-style-position: outside;
        }
    </style>
    <ul class="x2">
        <li>sss</li>
    </ul>
</body>
</html>